基于 DSP 与 CPLD 的灌装机同步控制系统设计

摘要

针对某型号灌装机控制精度及生产效率低等问题，设计了基于DSP和CPLD运动控制卡的交流伺服系统，以替代凸轮机构的控制功能。详细介绍了伺服系统的组成、同步控制、电子齿轮及快速回摆等功能的实现方法。采用CPLD对码盘信号进行倍频和鉴相处理，提高了同步控制信号的抗干扰能力；采用分段回摆策略，减少了过冲。实际应用表明，此系统不仅保证了系统同步控制精度，而且提高了生产效率。%In response to low control accuracy and productivity of a type of filling machine ,the paper proposes a set of AC servo control system based on DSP and CPLD for replacing the control functions of the cam mecha‐nism .The paper presents the servo system composition ,synchronous control ,the methods for achieving the func‐tions of electrical gears and the swing .It can improve the disturbance resistance ability of synchronous control sig‐nal through using CPLD by means of the quadruple frequency and phase discrimination of encoder output .It can reduce overshoot based on swing by two steps .The application shows that the system not only guarantees the syn‐chronous control accuracy but also improves the productivity .